Google Drive is Google's file sync app that lets you store all of your files online alongside your Google Docs documents, and keep them synced with all of your devices.
Attach the client's scope file to the quote under review.
Your quote approver can review the client's scope beside the draft quote, with the uploaded file attached from the scope form.
Check whether your quote has the sign-off needed to send.
Your sender can see whether a quote has cleared internal review before it goes to a customer. Missing sign-off stays on the document for follow-up.